q-exponential, Weibull, and q-Weibull distributions: an empirical analysis

Details q-exponential, Weibull, and q-Weibull distributions: an empirical analysis q-exponential, Weibull, and q-Weibull distributions: an empirical analysis

2003-01-28

arxiv.org/abs/cond-mat/0301552v1

Physica A 324 (2003) 678-688

Physics

Condensed Matter

Statistical Mechanics

6 pages, Latex. To appear in Physica A

Scientific paper

10.1016/S0378-4371(03)00071-2

In a comparative study, the q-exponential and Weibull distributions are employed to investigate frequency distributions of basketball baskets, cyclone victims, brand-name drugs by retail sales, and highway length. In order to analyze the intermediate cases, a distribution, the q-Weibull one, which interpolates the q-exponential and Weibull ones, is introduced. It is verified that the basketball baskets distribution is well described by a q-exponential, whereas the cyclone victims and brand-name drugs by retail sales ones are better adjusted by a Weibull distribution. On the other hand, for highway length the q-exponential and Weibull distributions do not give satisfactory adjustment, being necessary to employ the q-Weibull distribution. Furthermore, the introduction of this interpolating distribution gives an illumination from the point of view of the stretched exponential against inverse power law (q-exponential with q > 1) controversy.

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